espradio: implement support for wifi/BLE on the ESP32-C3

This is a work in progress. It does not yet work.

espradio/radio_other.go

@@ -0,0 +1,11 @@
+//go:build !esp32c3
+
+package espradio
+
+import "errors"
+
+var errUnsupportedChip = errors.New("espradio: unsupported chip")
+
+func initHardware() error {
+	return errUnsupportedChip
+}